The Debian-Live approach also provides some good opportunities. First and foremost, the very easy remastering makes it efficient to run with no persistent store quite often. For instance, upon remastering, I just start without the store, and the image I run is union-mounted with the persistence file and copied&compressed. Then I have to boot something else to copy the new squashfs image in place, but that's all that has to be done outside the system.
Boot the new image without persistence, create a new persistence file.
For further adaptations, the new persistence file can be mounted in an instance run under kvm, programs can be added and settings tweaked for an eventual new remastering.
Storing the series of squashfs-compressed images, one can always go back in this process if needed.
Cisco SFP-25G-SR-S 25GBPS Multi-Mode SFP+ Transceiver Module 1 Year Warranty
$333.00
Cisco SG110 24 Port Gigabit Ethernet Switch w/ 2 x SFP SG110-24
$117.00
Cisco Nexus N55-D160L3-V2 2 Ports Daughter Card Expansion Module 1 Year Warranty
$395.00
Genuine Cisco SFP-10G-SR V03 10GBASE-SR SFP+ Transceiver Module 10-2415-03
$8.00
For Cisco SFP-10G-T, Ubiquiti UF-RJ45-10G Module 10G SFP+ to RJ45 10GBase-T
$48.59
NEW Sealed Cisco SFP-10G-SR-S 10G SR SFP+ Module 850nmMM *US Shipping*
$15.00
GENUINE Cisco SFP-GE-T EXT 30-1421-01 USA 1000BASE-T RJ45 SFP Transceiver
$9.99
10 PCS Cisco GLC-LH-SMD 10-2625-01 1310nm SFP Transceiver Module
$85.00
NEW Sealed Cisco SFP-10G-LR 10GBASE-LR SFP+ 1310nm 10km *US Shipping*
$18.00